Pencil sharpener



FIG. 1 is a perspective view of a pencil sharpener showing my newdesign;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a left side elevational view; and

FIG. 6 is a bottom plan view.

The ornamental design for a pencil sharpener, substantially as shown.